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  11. Differing Growth Dynamics In Seed-grown Planar Vertical Chemical Gardens.
  1. Home
  3. Research Domains
  5. Chemical Sciences
  7. Inorganic Chemistry
  9. Inorganic Green Chemistry
  11. Differing Growth Dynamics In Seed-grown Planar Vertical Chemical Gardens.

Related Experiment Video

Chemical Gardens as Flow-through Reactors Simulating Natural Hydrothermal Systems
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Chemical Gardens as Flow-through Reactors Simulating Natural Hydrothermal Systems

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Differing growth dynamics in seed-grown planar vertical chemical gardens.

Mingchuan Zheng1,2, Emmanuelle Dumont1, Romero D Featherstone1

  • 1Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK. afr10@cam.ac.uk.

Soft Matter
|January 23, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Chemical gardens, lab models for hydrothermal vents, show anisotropic growth influenced by diffusion. Upward tubular growth correlates with increased internal pressure, offering insights into vent formation.

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Area of Science:

  • Materials Science
  • Geochemistry
  • Chemical Engineering

Background:

  • Chemical gardens are self-assembled, semi-permeable precipitate structures.
  • They serve as laboratory analogs for hydrothermal vents.
  • Potential applications exist in functional chemobrionic materials.

Purpose of the Study:

  • Investigate the behavior of chemical gardens grown from magnesium chloride seeds in sodium silicate solutions.
  • Analyze the anisotropic growth patterns and pressure dynamics within the gardens.
  • Explore the relationship between silicate concentration, growth morphology, and internal pressurization.

Main Methods:

  • Utilized a vertical Hele-Shaw cell for controlled growth experiments.
  • Grew chemical gardens using magnesium chloride seeds in sodium silicate solutions.
  • Monitored radial growth and internal pressure changes over time.

    • Main Results:

    • Observed non-isotropic radial growth, fastest at the bottom and slowest at the top.
    • Modeled radial growth in each direction using a diffusion-controlled law.
    • Identified an initial gradual pressure increase followed by rapid pressurization and plateau.
    • Found upward tubular growth at higher silicate concentrations, correlating with rapid pressurization.

    Conclusions:

    • Chemical garden growth is diffusion-controlled and directionally dependent.
    • Internal pressure dynamics are linked to specific growth morphologies like upward tubes.
    • Findings may inform mechanisms of hydrothermal vent flange formation.